One thing I'm trying to avoid is including any sort of JavaScript with DMZ. AJAX methods, by definition, require JavaScript. But there are dozens of decent-to-good JS libraries out there.
For example, I use Dojo Toolkit, because it includes a phenomenal widget library and base for creating your own widgets. However, I have used Prototype and jQuery in the past. Many others use YUI, or Google's library. All are decent, but they also all require significantly different approaches for writing your JS code, even as basic as how you structure your objects and manipulate the DOM.
I do, however, include an extension for converting objects into JSON. You can also use the Array extension combined with json_encode for the same thing. That's part of the AJAX equation. Well, part of the AJAJ equation, at any rate!
